S.D Timer vs Baker's % Calculator

S.D TIMER computes the exact feeding schedule for your sourdough starter, working backward from your target ready time to give you a precise feed time and gram-level recipe. HOW IT WORKS Enter six parameters: target ready time, quantity of starter needed (grams), desired hydration percentage, flour type, starter activity level (%), and ambient temperature (°C or °F). The app applies a fermentation kinetics model that factors temperature-dependent metabolic rates of lactic acid bacteria and wild yeast to calculate when your starter will hit peak activity. OUTPUT — YOUR FEEDING PLAN • Feed time: the exact moment to feed so your starter peaks on schedule • Starter / flour / water quantities in grams • Feed ratio (e.g., 1:9.8:9.8) • Estimated peak pH • Predicted flavor profile (mild, balanced, tangy, complex) • Recommended bread types suited to the resulting starter profile • Fermentation timeline chart with 80% activity window marked Set process alarms directly from the results screen to get notified at feed time and at peak. DESIGNED FOR PRECISION Temperature has a nonlinear effect on fermentation speed. A 5°C difference between summer and winter kitchens can shift peak time by 2–4 hours. S.D TIMER accounts for this so your timing stays consistent regardless of ambient conditions. Supports both Celsius and Fahrenheit. Works across all flour types including whole wheat, rye, spelt, and einkorn. Starter activity input lets you calibrate for your specific culture's behavior. PROFESSIONAL & HOME BAKERS Built for bakers who want repeatability and data-driven control over their sourdough process. Used by professional bakery instructors for workshop demonstrations and planning. No login required. Works offline once loaded. FREE VERSION This is the free edition of S.D TIMER, supported by banner ads. For an ad-free experience, upgrade to S.D TIMER Pro.

Weekend sourdough shouldn't mean bad math. Bakerate scales any bread recipe to the exact loaf count, weight, or hydration you need — and gets the starter math right every time. WHAT IT DOES • Scale to any size — enter a target weight, loaf count, or pick a pan preset, and every ingredient recalculates instantly in true baker's percentages. • Correct starter math — toggle "true hydration" to fold your starter's own flour and water into the total, the way real bakers do it, not the way most calculators fake it. • Bake time, scaled too — bigger batch doesn't mean guessing at the oven. Time and temperature adjust with the recipe. • Grams or ounces — switch units per recipe, no re-entering anything. • A real recipe library — save your own recipes alongside a starter set of sourdough, enriched, and whole-wheat formulas, with search and category filters. • Track what you bake — log each bake, build a streak, and watch your baking stats grow over time. WHY BAKERATE Most recipe apps treat bread like any other dish. Bakerate treats it like a baker does — as ratios, not just ingredient lists. Enter one recipe once, then bake it at any size without touching a calculator, a notebook, or a spreadsheet again. BAKERATE PRO REQUIRED Bakerate is available through Bakerate Pro — €2.99/month, €19.99/year, or a one-time €39.99 lifetime purchase. No free trial. Subscriptions are billed through your Apple ID and auto-renew unless cancelled at least 24 hours before the current period ends. Manage or cancel anytime in Settings → Manage Subscription. NO ACCOUNT, NO CLOUD, NO FUSS Every recipe lives on your device — no sign-up, no login, nothing uploaded. Open the app and start baking. PERFECT FOR • Home bakers who already know their hydration percentage • Anyone who's ever burned the outside scaling up a batch • Sourdough bakers tired of doing starter math by hand • Bakers who want one clean tool, not a social feed Questions or feedback? We'd love to hear from you.